Bearing for harrows



Mamch El, i9@ M. c. MAGARIAN 25m-@68 BEARING FOR HARRows Filed oct. 11, 194e' I7 IN VEN TOR.

JW. C'. M'agarian BY Patented Mar. 21, 1950 BEARING FOR HARROWS Masick C. Magarian, Fresno, Calif. y Application October 11, 1946, Serial No. 702,647

VThis invention is directed to, and itis an object to provide, an improved bearing unit for disc harrows. g

Another object of this inventionis to provide a bearing unit, for the purpose described, which is simple yet rugged in construction, and ref quires a minimum of maintenance or repair.

` A further object of the invention is to provide a bearing unit for disc harrows, lwherein the discs are secured on the central supporting shaft in a manner whereby said shaft rotates with the discs; the shaft in turn being mounted in connection With a novel bearing assembly.

An radditional object is to provide the bearing unit with advantageous lubricating means and lubricant seals.

It is also an object of the invention to provide a bearing unit designed for ease of assembly; theparts being arranged so that they may be assembled as a unit and the latter then engaged on the supporting shaft.

A further object of the invention is to produce a practical device and one which will be exceedingly eiective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the followingspecication and claims.

In the' drawings:

Figure 1 is a fragmentary top plan view of a disc harrow gang illustrating one of the bearing units as in use.

Figure 2 is an enlarged fragmentary sectiona elevation on line 22 of Fig. 1.

Figure 3 is a fragmentary cross section on line 3-3 of Fig. 2. v

Figure 4 is an end view of one'of the bearing bushings detached.

Referring now more particularly to the characters oi reference on the drawings, the invention is adapted to be embodied in a disc gang, as in Fig. l, with one of the bearing units, indicated generally at I, mounted between the two endmost discs 2 at each end of Asaid gang. The two endmost discs 2 at each end of the gang are supported by the corresponding bearing unit I which includes an outer split hub, indicated generally at 3, and an inner split hub, indicated generally at 4. ate discs of the gang are Supported and maintained in proper spaced relation by spacer sleeves 5 and other split hubs 6; the4 entire gang assembly being carried on a central shaft 1, here of hexagonal configuration in cross section, for

The remaining and intermedi- I 5 Claims. (Cl. 308-19) the purpose hereinafter described. 'I'he parts of the gang are maintained in proper assemblyon the shaft 'I by means of end nuts B locked" in place by lock washers 0; the hubs being ro-- tatable' with said shaft.

Each of the bearing units I is constructed and mounted on the central shaft I in the following manner:

The outer and inner split hubs 3 and 4 comprise cooperating hub sections l0 and II, and

I2 and I3, respectively. The hub Section I0 is4 formed for bearing engagement by the nut 8" whereas the hub section I2 includes a bore' I4.`

for the reception of the adjacent one of the spacer sleeves 5.

The hub sections la and es, of the split hubs 3 and fi, respectively, are formed at adjacent ends: with like diameter bores I5 internally enlarged;v

as shown, for the reception of annular sealing` elements IB.

The two adjacent endmost discs 2 are clamp-, ingly engaged between the hub sections IG andl II, and I2 and I3, of the hubs 3 and 4, respectively, in the manner clearly shown in Fig. 2, and a bearing sleeve I I surrounds the shaft 1 in clearance relation between said hubs.

Opposite end portions of the bearing sle'eve. I1 project into the bores I5 with a clearance lt and are therein engaged by the annular sealll ing elements I6.

Centrally of its ends, and interiorly th'ereof,li= the bearing sleeve Il is tted with a thrust col-#- between the thrust collar I8 and adjacent ends of the bearing bushings 20; the axial extent of the latter being such that their outer ends project slightly beyond corresponding ends of the bearing sleeve I'I. Thus the hub sections I l and I3 may be brought into positive frictional engagement with adjacent ends of the bearing bushings 20 while permitting the bearing sleeve Il to remain stationary upon rotation of the shaft I and the hub mounted discs thereon.

A lubricant dome 23 is fixed on, and upstands from, the bearing sleeve I1 centrally of its ends, and communicates through a port 24 with the interior of said bearing sleeve I1; the thrust collar I8 being cut away or split, as at 25, in alinement with the port 24 whereby lubricant may gain ready access into the central assembly of the bearing unit. A fitting 26 on the outer end of the dome 23 is provided for the purpose of introducing lubricant into said dome.

On top of the bearing sleeve l1 is fitted a horizontal generally tangential bracket bar 21 which is of inverted channel configuration in cross section; the dome 23 projecting upwardly therethrough intermediate the ends of said bearing. The bracket bar 21 is perforated, as at 28, for attachment of said bar to the frame of the implement. In this manner each bearing unit I can be xedly secured to the implement frame.

When the described bearing unit is in use in a disc gang, the bearing sleeve I1, together with bracket bar 21 and lubricant dome-23, remain stationary; the assembly of the central shaft 1, the bearing bushings 20, spacer ring I9, and the hubs 3 and 4, together with the discs clamped therein, rotating upon advance of the implement.

Each'bearing unit I can, by reason of the design thereof, be wholly assembled separately from the shaft 1, and then applied thereto materially facilitating assembly of the device.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fullls the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as dened by the appended claims.

Having thus described the invention, the following is claimed as new and useful and upon which Letters Patent is desired:

1. A bearing unit for a disc gang having a noncircular rotatable shaft and spaced apart disc supporting hubs mounted on the shaft, said unit comprising a stationary bearing sleeve disposed between a pair of the hubs and surrounding the shaft in clearance relation, a thrust collar fixed in the sleeve intermediate its ends, a pair of axially alined but spaced bearing bushings mounted and supported by the sleeve, each bushing being interposed between one of the hubs and the thrust collar, the hubs and bushings having non-circular bores through which the shaft matchingly extends, and means securing said pair of hubs and the bushings in engagement and against axial separation.

2. A structure as in claim 1 in which the thrust collar extends about the shaft in clearance relation and is provided with a split at the top, and a lubricant reservoir on the sleeve in communication with the interior of the sleeve at the split.

3. A structure as in claim 1 in which the thrust lcollar is provided with a circular bore concentric to but of larger diameter than the shaft, and an annular spacer ring turnable in said bore, said ring having an axial bore through which the shaft extends in-matching relation.

4. A structure as in claim 3 including thrust Washers 'interposed between the collar and the adjacent endsof the bushings.

5. A bearing mount for a disc gang having a non-circular rotatable shaft and spaced apart disc supporting hubs mounted on the shaft, said unit comprising a stationary bearing sleeve disposed between a pair of the hubs and surrounding the shaft in clearance relation, a thrust collar fixed in the sleeve intermediate its ends, said collar being provided with a circular bore concentricto but of larger diameter than the shaft, an annular spacer ring turnable in said bore, said ring having an axial bore through which the shaft extends in matching relation, said collar being split at a point in its circumference, a lubricant reservoir on the sleeve, said reservoir being in communication with the interior of said sleeve at the split in the collar, a pair of axially alined but spaced bearing bushings mounted in and supported by the sleeve, each bushing being inter- REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Date Number Name 861,704 Brew July 30, 1907 1,287,518 Thompson Dec. l0, 1918 1,971,547 White Aug. 28, 1934 2,097,244 Sjorgen Oct. 26, 1937 

